add log config

rootfs/etc/services.d/synapse/run

@@ -1,5 +1,4 @@
 #!/usr/bin/with-contenv sh
 
 cd /var/lib/synapse
-source /var/lib/synapse/bin/activate
-s6-setuidgid synapse python -B -m synapse.app.homeserver -c server.yaml
+s6-setuidgid synapse /var/lib/synapse/bin/python -B -m synapse.app.homeserver -c server.yaml

rootfs/var/lib/synapse/log.config

@@ -13,7 +13,7 @@ handlers:
   file:
     class: logging.handlers.RotatingFileHandler
     formatter: precise
-    filename: /homeserver.log
+    filename: /var/lib/synapse/homeserver.log
     maxBytes: 104857600
     backupCount: 10
     filters: [context]